配置自己的UC/OS—II操作系統

每個具體的嵌入式應用系統對實時操作系統的要求是不完全相同的，在實際做項目中，一般我們不可能全部用到UC/OS-II操作系統給我們的所有資源。並且為了減少引入UC/OS操作系統而占用系統的寶貴資源。我們要根據具體情況來對UC/OS操作系統進行裁剪，得到一個即滿足需要，又非常緊湊的應用軟件系統。

在UC/OS的配置文件(OS_CFG.H)中，對相關的配置常量進行相關的設置。
現對OS_CFG.H中的一些常量配置進行說明：
先看程序：

1. /*
2. *********************************************************************************************************
3. * uC/OS-II
4. * The Real-Time Kernel
5. *
6. * (c) Copyright 1992-2001, Jean J. Labrosse, Weston, FL
7. * All Rights Reserved
8. *
9. * uC/OS-II Configuration File for V2.51
10. *
11. * File : OS_CFG.H
12. * By : Jean J. Labrosse
13. *********************************************************************************************************
14. */
16. /*
17. *********************************************************************************************************
18. * uC/OS-II CONFIGURATION
19. *********************************************************************************************************
20. */
22. #define OS_MAX_EVENTS 42 /* Max. number of event control blocks in your application ... */
23. /* ... MUST be > 0 */
24. #define OS_MAX_FLAGS 9 /* Max. number of Event Flag Groups in your application ... */
25. /* ... MUST be > 0 */
26. #define OS_MAX_MEM_PART 9 /* Max. number of memory partitions ... */
27. /* ... MUST be > 0 */
28. #define OS_MAX_QS 12 /* Max. number of queue control blocks in your application ... */
29. /* ... MUST be > 0 */
30. #define OS_MAX_TASKS 12 /* Max. number of tasks in your application ... */
31. /* ... MUST be >= 2 */
33. #define OS_LOWEST_PRIO 62 /* Defines the lowest priority that can be assigned ... */
34. /* ... MUST NEVER be higher than 63! */
36. #define OS_TASK_IDLE_STK_SIZE 512 /* Idle task stack size (# of OS_STK wide entries) */
38. #define OS_TASK_STAT_EN 1 /* Enable (1) or Disable(0) the statistics task */
39. #define OS_TASK_STAT_STK_SIZE 512 /* Statistics task stack size (# of OS_STK wide entries) */
41. #define OS_ARG_CHK_EN 1 /* Enable (1) or Disable (0) argument checking */
42. #define OS_CPU_HOOKS_EN 1 /* uC/OS-II hooks are found in the processor port files */
45. /* ----------------------- EVENT FLAGS ------------------------ */
46. #define OS_FLAG_EN 1 /* Enable (1) or Disable (0) code generation for EVENT FLAGS */
47. #define OS_FLAG_WAIT_CLR_EN 1 /* Include code for Wait on Clear EVENT FLAGS */
48. #define OS_FLAG_ACCEPT_EN 1 /* Include code for OSFlagAccept() */
49. #define OS_FLAG_DEL_EN 1 /* Include code for OSFlagDel() */
50. #define OS_FLAG_QUERY_EN 1 /* Include code for OSFlagQuery() */
53. /* -------------------- MESSAGE MAILBOXES --------------------- */
54. #define OS_MBOX_EN 1 /* Enable (1) or Disable (0) code generation for MAILBOXES */
55. #define OS_MBOX_ACCEPT_EN 1 /* Include code for OSMboxAccept() */
56. #define OS_MBOX_DEL_EN 1 /* Include code for OSMboxDel() */
57. #define OS_MBOX_POST_EN 1 /* Include code for OSMboxPost() */
58. #define OS_MBOX_POST_OPT_EN 1 /* Include code for OSMboxPostOpt() */
59. #define OS_MBOX_QUERY_EN 1 /* Include code for OSMboxQuery() */
62. /* --------------------- MEMORY MANAGEMENT -------------------- */
63. #define OS_MEM_EN 1 /* Enable (1) or Disable (0) code generation for MEMORY MANAGER */
64. #define OS_MEM_QUERY_EN 1 /* Include code for OSMemQuery() */
67. /* ---------------- MUTUAL EXCLUSION SEMAPHORES --------------- */
68. #define OS_MUTEX_EN 1 /* Enable (1) or Disable (0) code generation for MUTEX */
69. #define OS_MUTEX_ACCEPT_EN 1 /* Include code for OSMutexAccept() */
70. #define OS_MUTEX_DEL_EN 1 /* Include code for OSMutexDel() */
71. #define OS_MUTEX_QUERY_EN 1 /* Include code for OSMutexQuery() */
74. /* ---------------------- MESSAGE QUEUES ---------------------- */
75. #define OS_Q_EN 1 /* Enable (1) or Disable (0) code generation for QUEUES */
76. #define OS_Q_ACCEPT_EN 1 /* Include code for OSQAccept() */
77. #define OS_Q_DEL_EN 1 /* Include code for OSQDel() */
78. #define OS_Q_FLUSH_EN 1 /* Include code for OSQFlush() */
79. #define OS_Q_POST_EN 1 /* Include code for OSQPost() */
80. #define OS_Q_POST_FRONT_EN 1 /* Include code for OSQPostFront() */
81. #define OS_Q_POST_OPT_EN 1 /* Include code for OSQPostOpt() */
82. #define OS_Q_QUERY_EN 1 /* Include code for OSQQuery() */
85. /* ------------------------ SEMAPHORES ------------------------ */
86. #define OS_SEM_EN 1 /* Enable (1) or Disable (0) code generation for SEMAPHORES */
87. #define OS_SEM_ACCEPT_EN 1 /* Include code for OSSemAccept() */
88. #define OS_SEM_DEL_EN 1 /* Include code for OSSemDel() */
89. #define OS_SEM_QUERY_EN 1 /* Include code for OSSemQuery() */
92. /* --------------------- TASK MANAGEMENT ---------------------- */
93. #define OS_TASK_CHANGE_PRIO_EN 1 /* Include code for OSTaskChangePrio() */
94. #define OS_TASK_CREATE_EN 1 /* Include code for OSTaskCreate() */
95. #define OS_TASK_CREATE_EXT_EN 1 /* Include code for OSTaskCreateExt() */
96. #define OS_TASK_DEL_EN 1 /* Include code for OSTaskDel() */
97. #define OS_TASK_SUSPEND_EN 1 /* Include code for OSTaskSuspend() and OSTaskResume() */
98. #define OS_TASK_QUERY_EN 1 /* Include code for OSTaskQuery() */
101. /* --------------------- TIME MANAGEMENT ---------------------- */
102. #define OS_TIME_DLY_HMSM_EN 1 /* Include code for OSTimeDlyHMSM() */
103. #define OS_TIME_DLY_RESUME_EN 1 /* Include code for OSTimeDlyResume() */
104. #define OS_TIME_GET_SET_EN 1 /* Include code for OSTimeGet() and OSTimeSet() */
107. /* ---------------------- MISCELLANEOUS ----------------------- */
108. #define OS_SCHED_LOCK_EN 1 /* Include code for OSSchedLock() and OSSchedUnlock() */
111. #define OS_TICKS_PER_SEC 200 /* Set the number of ticks in one second */
114. typedef INT16U OS_FLAGS; /* Date type for event flag bits (8, 16 or 32 bits) */